Multistamp automatic inking stencil device



Sept. 1, 1936. o. E. BOROWETZ MULTISTAMP AUTOMATIC INKING STENCIL DEVICE Filed NOV. 14, 1935 INVENTOR ATTORNEY Patented Sept. 1 1 936 rap; STATES PATENT OFFIE MULTISTAMP AUTOMATIC INKING STENCIL DEVICE 5 Claims.

The main object of this invention is to provide a device for holding stencils for multigraphing machines and its purpose is to provide a machine equipped with an ink well, sealed so as to con- 5 tain a vacuum pocket which permits a predetermined quantity of ink to penetrate the letters and characters on the stencil.

Another object of the invention is to provide an automatic multigraphing machine having a 10 vacuum pocket adapted to be partly filled thru an aperture with ink, the vacuum retaining all but a minimum amount of ink within the ink well.

The above and other objects will become ap- 15 parent in the description below in which characters of reference refer to like-named parts in the drawing.

Referring briefly to the drawing Figure 1, is a top plan View of the stenciling device with the 20 cover removed therefrom to expose the mechanism therein for creating the vacuum pocket.

Figure 2 is a longitudinal, sectional, elevational view thru the stencil machine taken on line 2-2 of Figure 1.

25 Figure 3 is a cross sectional view taken on line 33 of Figure 1.

Referring in detail to the drawing the numerals i6 and M, indicate the end walls of a casing which is composed of several members. A substantially semi-circular plate l2, forms the remainder of the casing and is provided with perforations l3, against the inside of which a stencil sheet is secured. The plate I2, is secured to and has its ends embedded within a rectangular frame 35 member M. The end walls I8 and II, have right angle lips I5, thereon beneath which the edges of a cover member not shown on the drawing is slidably received. Along the interior edges of the frame it, a plurality of inwardly extending studs 40 it, are provided, these stud members are adapted to receive thereon and support clutch bars l1, i8, i9, and 20. The bars have a semi-circular face 2!, and are adapted to have situated between them and the frame member I4, and sides It! 45 and H, a semi-circularly formed flexible rubber pouch 22. Extending from the frame sides M, of the device on each side of the latter and inwardly are pairs of supporting rods 23 and 24. These rods extend outwardly in a horizontal plane and are provided with hollowed out cradles 25, in which carrier handles 26 and 21, are supported. The handles extend longitudinally in the device and are secured to the pouch 22, by screws 28. Each of the studs I6, are provided 55 With a wing nut by means of which the edges of the rubber pouch 22, are compressed'to form'a leak proof fit between the outer device and the rubber pouch so as to provide a vacuum pocket 29, beneath the pouch and between the pouch member and the perforated plate l2. In order 5 to partly fill the well 29, with ink of the multigraphing type an opening is provided in the pouch into which a stopper 30, is threaded.

This device may be presented in modified form and eliminate the pairs of rods 23 and 24. In- 10 stead of securing rods to the frame bars I9 and 20, such as those indicated by the numerals 23 and 24, the studs 16, may be extended at convenient positions so as to form a support for the handles 26 and 21.

The device in use is adapted to serve as a machine upon which stencils are mounted for purposes of multigraphing sets of characters by rolling a stencil surface over a sheet of paper or the like for an impression. The stencil is secured to the outer surface of the plate E2, in any desired manner. Ink is filled into the well 29, after removing the threaded stopper 30, care being taken that at this operation the handles 26 and 21, are not supported by the rods 23 and 24, when the 25 ink has been filled and the stopper caps the opening the handles are lifted to supporting position upon the rods 23 and 24, and the rubber pouch 22, assumes the position shown in Figure 2. This operation produces a partial vacuum in the well 29, and prevents an excessive flow of ink from the perforations IS in the plate E2, of the surface of the stencil. A vacuum is absolutely necessary in the well 29, or otherwise excessive ink would flow due to capillary attraction.

It is to be noted that certain changes in form and construction may be made without departing from the spirit and scope of the invention.

I claim:

1. In a device of the class described a casing having a perforated semi-circular bottom adapted to have a stencil mounted thereon, a rubber pouch secured in said casing, a frame comprising bars adapted to compress the edges of the said pouch, means for securing said bars to said casing and means for retaining said pouch in lifted position in said casing,

2. In a device of the class described a casing having a perforated semi-circular bottom adapted to have a stencil mounted thereon, a rubber pouch secured in said casing, a frame comprising bars adapted to compress the edges of the said pouch, threaded studs projecting from said casing internally, said studs, having said bars mounted 55 said bars to said casing, and means on said pouch for suspending the latter from said rods.

4. In a device of the class described acasin'g having a perforated semi-circular bottom adapted to have a stencil mounted thereon, a rubber pouch secured in said casing, a frame comprising'bars adapted to compress the edges 'of the said pouch threaded studs projecting from said casing internally, said studs having said bars mounted thereon, rods extending sidewise from saidv bars,

said studs having wing nuts thereon, to securesaid bars to said casing, handles on said pouch adapted to be supported by said rods to form a vacuum well between said pouch and said bottom of said device.

5. In a device of the class described a casing having a perforated semi-circular bottom adapted to have a stencil mounted thereon, a rubber pouch secured in said casing, a frame comprising bars adapted to compress the edges of the said pouch threaded studs projecting from said casing in- ..ternally, said studs having said bars mounted thereon, rods extending sidewise from said bars,

; said studs having wing nuts thereon, to secure said bars to said casing handles on said pouch adapted to be supported by said rods to form a vacuum well between said pouch and said bottom [of said .device, saidrrods having saddles thereon adapted to receive said handles for lifting said pouch to lifted position.

- O'I'I'O E. BOROWETZ. 

